730-Watt stretchable LED grow light with SamSung diodes, 1860 SamSung LM281B+Pro diodes, scientific layout, plus advanced driver, excellent optical uniformity, providing long-lasting high efficiency, PPE up to 2.732umol/j. Maximum output 3.0g/w. Full spectrum: composed of cool white 5000K + warm white 3000K + red 660nm and equipped with a dimmer knob, with 4 levels of light intensity, ranging from 0% (off) to 25%, 50%, 75%, 100%, for plants All stages provide ideal lighting. The patented thermodynamic self-circulating cooling system reduces the temperature by 30% compared to similar products. It has no fans, no noise and no additional cooling costs, saving you energy costs. Color: Black. Material: Steel.